21184696

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1$

素因数の和:260

約数の個数: 64

約数和(自身を含む): 45964800

約数和(自身を除く): 24780104

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 52, 71, 76, 104, 142, 151, 152, 247, 284, 302, 494, 568, 604, 923, 988, 1208, 1349, 1846, 1963, 1976, 2698, 2869, 3692, 3926, 5396, 5738, 7384, 7852, 10721, 10792, 11476, 15704, 17537, 21442, 22952, 35074, 37297, 42884, 70148, 74594, 85768, 139373, 140296, 149188, 203699, 278746, 298376, 407398, 557492, 814796, 1114984, 1629592, 2648087, 5296174, 10592348, 21184696]

約数ペア:

[(1, 21184696), (2, 10592348), (4, 5296174), (8, 2648087), (13, 1629592), (19, 1114984), (26, 814796), (38, 557492), (52, 407398), (71, 298376), (76, 278746), (104, 203699), (142, 149188), (151, 140296), (152, 139373), (247, 85768), (284, 74594), (302, 70148), (494, 42884), (568, 37297), (604, 35074), (923, 22952), (988, 21442), (1208, 17537), (1349, 15704), (1846, 11476), (1963, 10792), (1976, 10721), (2698, 7852), (2869, 7384), (3692, 5738), (3926, 5396)]